Driving mechanism for valves and other devices



PETER 1. DEAN, oE NEW YORK, N. Y.

-DRIVINMECHANISM FOR VALVES ATTI) OTHER DEVICES.

Specification of Letters Patent.` Patented Feb, 17, 1920.

Application led October 1, 1917. Serial No. 194.212.

To all whoa?J t may concern Be it known that I, PETER P. DEAN, a subjectof the King of England, residingat New York, in the 'county of Bronx andState of New York, have invented new and useful Improvements in DrivingMechanisms for Valves and other Devices, of which the following is afull, clear, concise, and exact description, reference being had to theaccompanying drawing, forming a part of this specification.

This invention relatesto driving mechanisms for valves and otherdevices.

In my prior Patent No. 1,245,574, issued Nov. 6,1917, there is discloseda driving mechanism including a normally restrained member releasabletoeect substantially instantaneous release of the driven member from thedriving member, together with alternative mechanical and electricalcontrol means for said normally restrained member, and said1 electricalcontrol means forms in part the subject matter of this application.

Also, this application discloses a modification of such electricalcontrol means together with a modification of the driving mechanism. Inthe accompanying drawing,

Figure 1 shows schematically the aforesaid driving mechanism and showsdiagrammatically one of the forms of electrical control means shown insaid copending application;

Fig/ 2 shows diagrammatically anothery form o'f electrical control meansshown in said prior patent; and,

Fig. 3 shows diagrammatically and schematically the aforesaidmodifications.

Referring, to Fig. 1, the same schematically illustrates a driven shaft1, a driving motor 2 and planetary speed reducing gear 3 for connectingthe same. The planetary gear includes a pinion 3a driven by the motor 2,as by a shaft 4, a plurality of pinions 3b carried by a member 5 i'iXedto the driven y shaft and an internally toothed ring 3. The pinions 3bare arranged between and in mesh with the pinion 3a and toothed ring 3and said ring is revolu'ble and forms the aforesaid restrainabley andreleasable member. Thus as will be apparent, restraint of the ring willrender the planetary gear effective as a driving connection between themotor 2 and shaft 1 and for so restraining the ring there is provided apawl 6` adapted to be projected into a peripheral groove 7 in said ringand into the path, `of a block 8 fixed in said groove. release of thering by the pawl will allow rotary play thereof for release of thedriven shaft from the driving motor. The pawl has two extremities 6a and6b to coperate with the block 8 of the ring and the arrangement is suchthat whenever f the pawl is rocked from either extreme position to theother it will Withdraw one extremity from the path of said block andproject the other extremity thereof into the path of said block. Thusthe pawl when so operated. provides for release of the ring andrelooking thereof b ut sub-ject to a given rotary play of said ring inreverse directions.

Considering now the control means shown in Fig. 1, the same includessolenoids 10 and 11 for shifting the pawl 6 from one extreme position tothe other selectively, limit switches 12 and 13 `for terminating thepower supply to the motor and controlling said solenoids and a masterswitch 14 for starting said motor in opposite directions selectively.The limit switches 12 and 13 are operable by a traveling member l5mounted upon a` screw threaded' shaft 16 which is driven from the shaft1 through a pinion 17 and gear 18; The limit switch 12 has twoelectrically independent sets of contacts 12a and 12b, the formercontrolling the continuity of the motorr circuit and 'both coperating tocontrol the continuity of circuit of solenoid 10, the arrangement'beingsuch thaththe latter contacts engage prior to disengagement ofthe formercontacts. The limit switch 13 has vsimilar sets of contacts 13a and 13",

the former controlling the oontinunity of the motor circuit and bothcoperatin control the circuit of solenoid 11. hus wheneither limitswitch isfoperatedit will On the other hand,

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energize one. of the^ so-lenoids to shift the pawl and thereuponsimultaneously interruptthe motor circuit and denergize such solenoid.And the relation of parts is such that the pawlhas given positions forre- -verse operations of the driven memberwhereby Whenever the sameisshifted as describedin response to the limit switches,it will' releasethe ring'fonrotation in a direction corresponding to the direction of`concurrent operation of the motor. `This motor to line L.

will effect instantaneous release of the driven member, which will beimmediately followed by interruption or" the motor circuit and assumingsuflicient inertiar of the motor to r0- tate the ring until the latteris 'rearrested a hammer-like blow will be imparted to the drivenmechanism. Then if the motor be started in a reverse direction it willrotate the ring in a reverse direction for substantially one revolutionuntil the block 8 engages the opposite side of the projected pawlextremity whereupon the driving connection will be restablished and thedriven mechanism will be started in a reverse direction and with ahammer-like blow. Also, reversal of the driven shaft will reverse thedrive of the traveling device'l for resetting of the tripped limitswitch.

Describing the circuit arrangement illustrated in Fig. 1, positioning ofthe master switch 14 as shown completes circuit from line L to contact14c through segment 14g to contact 14d, by conductor 20 through themotor armature A, by conductor 21 to contact 14h, through segment 14t tocontact 14a, 'by conductor 22 through contacts 13a of limit switch 13,by conductors 23 and 24through the series field winding F of the motor,by conductor 25 to linev L. Such connections, it may be assumed, effectoperation of the motor tending to rotate the ring 3c in acounter-clockwise direction for operation of the driven shaft in adirection to move thetraveling device 15 to the right for actuation oflimit switch 13. Actuation of limit switch 13 opens the motor circuit,but prior thereto completes the circuit of solenoid 11.' This circuitmay be traced from line L by conductor 216 through winding 11, byconductor 27 through contacts 13b of switch 13, b-y conductors 28 and 22through contacts 13a, by conductors 2,3 and 24 through the series fieldwinding of the Accordingly the pawl will be shifted to the right to freethe ring with the results 'albove described, and the circuit of solenoid11 will be interrupted upon disengagement of contacts 13a forinterruption of the motor circuit. With the master switch in its otherposition the motor circuit may be traced from line L to contact Areverse operation of the motor and consequent reverse operation of theshaft 1. Such operation of the shaft 1 moves the device l5 to the leftfor actuation of limit switch 12 and said limit switch when op` eratedinterrupts the motor circuit at contacts 12e. Previously to so doingsaid limit switch completes circuit from line L by conductor 26 throughsolenoid 10, by conductor 31 through contact 12b, by conductors 32 and30 through conta-cts 12a, by conductors 23 and 24 through the seriesfield winding to line L as already traced. This provides for shiftingthe pawl 6 back to the position shown, with the result of againreleasing the ring for arrest of the driven shaft.

ln the arrangement shown in Fig. 2, a reciprocating plug 35 issubstituted for the pawl 6 and said plug is provided with a spring 3Gnormally projecting the same into the groove in the ring 3c and with an'electromagnetic winding 37 for withdrawing the same :from said groove.The limit switch mechanism is identical with that shown in Fig. 1 but inthis instance theA limit switch controls parallel circuits for saidwinding 37 and operation of either limitswitch serves to energize saidWinding prior to interruption of the motor circuit and to denergize saidwinding upon interruption of the motor circuit. In consequence theretraction of the plug will be only momentary to permit the bloclr 8 ofthe ring to pass beneath the same, the plug being thereupon againprojected into the groove for effecting the same control of the drivingconnection as that effected by the pawl 6. Also, in this instance themaster controller is provided with additional contacts 14J and 14k forcoperation with the limit switches to control the parallel circuits.With the master switch in the position shown, tripping of limit switch13 completes the circuit of winding 37 from conductor L by conductor 38,through said winding, by conductor 39 through contacts 13b of said limitswitch, by conductor 40 to contact 14j, through segment 14f to contact14a, by conductor 41 through contacts 13a of said limit switch, byconductor 42 throu h the series field `winding to line L. On t e otherhand, with the master switch in its 'other position, tripping of' limitswitch 12 completes the circuit of winding 37 from line L by conductor38 through said winding, by conductor 43 through contact 12b of limitswitch 12, by conductor 44 to contact 14k through segment 14i to contact14e, by conductor 45 through contacts 12a of said `limit switch toconductor 42 and thence to is provided a reci rocating plug 50 having atits end teeth to engage teeth 52 provided on the periphery of ring 3 inlieu of the groove and block above described. 5 The teeth of the ringand plug are adapted when engaged to lock the ring against rota'- tionin either ,direction and hence the plug provides for locking the ring inany angular position thereof for immediate establishment of a drivingconnection without the necessity of taking up any play of the ring.Also, in this instance, the plug is provided with a spring 53 forretraction thereof to release the ring and with an electromagneticwinding 541to project the same into engagement with the ring. Thewinding 54 is adapted Jfor series connection with ,the motor and .iscontrollable by the contacts 12 .and 132l of the limit switches which inthis instance require no additional contacts. The arrangement is suchthat when the motor circuit is completed through either limit switch thewinding 54 will'be energized to project the plu 50 into locking positionfor immediate esta' lishrnent of a driving connection between the motorand driven' shaft whereas tripping of the active limit switch willsimultaneously interrupt the motor circuit and denergize the winding 54for release of the plug and consequent immediate interruption o thedriving connection. Also the arrangement is such that the winding 54 isplaced under the control of the master switch 14 whereby the mechanicaldrive may be at any time interrupted by positioning the master switch tointerrupt the motor circuit. And as will be apparent, such control ofthe driving connection enables the driven mechanism to be inched orotherwise intermittently operated at will.

The circuit arrangement shown in Fig. 3 is such that with the masterswitch positioned as illustrated circuit may be traced from line L, byconductor 55 to and through contacts 14, 14g, and 14d, by conductor 56through the motor armature from right to left, by conductor 57 to` andthrough contacts 14", 14 and 14a, by conductor 58' through contacts 13ilof limit switch 13, 50 by conductor 59 through winding 54, `by

conductor 60 through the series field winding of the motor to line L. Onthe other hand, with the master switch in its other circuit closingposition circuit may be tracedl 5. from line L by conductor 55 to andthrough contacts 14, 14v and 14", by conductor 57 to and throughcontacts 14d, 14"*and 14e, by

conductor 61 to and through contacts12L of limit switch 12, .byconductor 59 -through .3 winding 54 and thencethroughl the series fieldof the motor'to line L. Thus movement of the master switch to anintermediate position provides for interruption of all of said circuitsto denergize winding 54 and S5 terminate the power supply to the motor.

What I `claim as new 'anddesire to secure by Letters Patent is:

1. In combination, a reversible driving element, an element to be driventhereby in opposite directions, a driving connection be 70 tween saidelements including a member to be respectively restrained and releasedto render said connection eective and ineffective, an electromagneticyrestraining device for said member and means operable by one of saidelements upon operation thereof in either direction to a given limit tocontrol said restraining device.

2. In combination,l a reversible driving element, an element to bedriven thereby in opposite directions, a driving connection between saidelements including a member to be respectively restrained and releasedto render said connection effective and inefective, an electromagneticrestraining device 85 for said member and circuit controlling means forsaid device operable )by one of said elements after operation thereof ineither direction to a given limit to eiiect releasing operation of saiddevice, said controlling means providing for, disconnec-v tion of saiddevice from circuit during sub? sequent idleness of said connection.

l 3. In combination, driving and driven elements, a driving connectiontherebetween including a member to be respectively restrained andreleased toi render said connection effective and ineffective, andelectromagnetic restraining means or said member controlled by one ofsaid elements for eiecting release of said member at given limits and`for thereafter restraining said member for effectiveness of saidconnection upon reverse operation of said driving element. i 4. Incombination, v a reversible driving element, an element to be driventhereby in opposite directions, a driving connection between saidelements including 'a member to be restrained to renderA said connectionef- 110 fective and to be released to render said connectionineffective, a device movable to different positions to restrain andrelease said member selectively, said device being biased tol oneof saidpositions and electromagnetic means controlled by one of said elementsupon operation thereof in either direction to a given limit to move saiddevice to another of said positions.

.5. In combination, driving and driven 120 elements, a -drivingconnection therebetween including amember to be restrained to rendersaid connection effective and to be rei leased to renden said connectionineffective, a

device movableto one position for restraint of said member and toanother position' for release of said member, said device being biasedto one of'said positions, electromagnetic means for moving said deviceto the other of saidpositions and means operated by oneA operate thesaine in opposite directions, av

driving connection between said element and said means including amember requiring restraint to render said connection effective,

an electromagnetically controlled restraining device for said member andmeans operated by said element after operation thereof in eitherdirection to agiven limit to control the power supply to said drivingmeans and to control said restraining device.

7. In combination, an element to be driven, reversible power drivingmeans therefor to operate the same in opposite directions, a drivingconnection between said element and said means Aincluding a member t0 berestrained to render said connection eiective and to be released torender said connection ineffective, an electromagneti'cally controlledrestraining device for said mem'ber and means operated by said elementto control both said 'driving means and said restraining device to e'ectrelease f said member and termination of the power supplied to saiddriving means upon operation of said element in either direction to agiven limit.

8. In combination, an element to be driven, reversible power drivingmeans therefor, a driving connection therebetween including a member tobe restrained to render said connection effective and released to rendersaid connection ineffective, limit means for said driving means operableby said element and an electromagnetic restraining device for saidmember also controlled by said limit means to provide for release ofsaid member at given limits and for subsequent restraint of said memberupon reversal of said driving means.

In witness whereof, I have hereunto subscribed my name.'

. PETER P, DEAN.

